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Diet and sleep health: A scoping review of intervention studies in adults
In this scoping review by Burrows, Fenton & Duncan (2020), the authors compile the available evidence examining the relationship between sleep and dietary intake (encompassing free-living, laboratory-based, and mixed experimental designs), paying further consideration to the influence of geographical and subpopulation representation in the interpretation of study outcomes, spurred by the evidence-based links between sleep quality and dietary intake playing a role in the predisposition to chronic diseases. Through searching five online databases (searching for publications that met inclusion criteria from 1970 to 2017), 109 studies were found to investigate the impact of diet on sleep outcomes, and 20 studies were found to investigate the impact of sleep interventions in association with dietary findings. A majority of the sleep interventions reported were laboratory-based, while dietary interventions were mostly implemented in free-living settings. Studies that investigated the use of sleep intervention did so exclusively in terms of sleep duration, with three studies conducted using total sleep deprivation, and 17 other studies investigating the impact of restricted sleep hours (5.5 hr/night) on participant dietary intake. On the other hand, studies investigating dietary interventions utilized supplements, with the majority including caffeine (49 out of 66 studies). The authors comment that further avenues of the relationship between diet and sleep quality should be explored in future studies, such as dietary habits, dietary quality, and detailed sleep components like sleep hygiene, timing, and quality. [NPID: Diet, diet quality, scoping review, sleep, sleep health]
Year: 2020
